I'm building up a touring/commuter. Other than mountain bikes that I've had in the past, everything I've owned has been 700C.
There seems to be a growing trend/movement to 26" touring bikes, and I'd really like to get a Surly LHT, but I think I'd be better off w/ 700C.
I do understand some of the advantages, such as:
Slightly easier to transport
But, I will likely never tour outside the US.
All other things being equal (gearing, set up, etc.), why should I go 26"